Battery block

a battery block and block technology, applied in the field of battery blocks, can solve the problems of abnormal heat generation, chain reaction of degradation and abnormalities of the accommodated unit cells, and the characteristic degradation of the normal unit cell also undergoes abnormalities, so as to prevent the chain reaction of degradation and abnormalities of the unit cell
US9548477B2Active Publication Date: 2017-01-17PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Patents(United States)
Current Assignee / Owner
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Publication Date
2017-01-17

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Abstract

The present invention provides a battery block that accommodates unit cells having higher capacities, and, even in case of abnormal heat generation in the unit cell, does not cause abnormal heat generation in the neighboring unit cells, thereby preventing a chain reaction of degradations and abnormalities of the accommodated unit cells. The battery block of the present invention includes a battery case having a minimum thickness section satisfying the relationship “K2 / K1≧K3−1”. K1 is the thermal conductance between the battery case and the unit cell. K2 is the thermal conductance of the minimum thickness section of the battery case between two neighboring holes for accommodating the respective unit cells. K3 is a ratio between the abnormal heat temperature of a reference cell and the ambient temperature causing abnormal heat generation in this cell.
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Description

TECHNICAL FIELD

[0001] The present invention relates to a battery block where a plurality of cells are accommodated in a battery case.BACKGROUND ART

[0002] Battery blocks, each composed of a plurality of unit cells accommodated in a battery case in such a way as to allow a predetermined current to flow at a predetermined voltage, are widely used as power sources for various applications including various devices and vehicles. A recent trend is the use of technology in which battery blocks are combined into a module and different combinations of modules are used depending on different applications. Furthermore, an improvement in the performance of the unit cell reduces the module's size and weight, as well as improves the working efficiency in the assembling of a battery block. The technology of combining modules offers advantages such as improved flexibility in arranging a power source in a limited space of, for example, a vehicle.

[0003] As secondary cells are improved in their performan...

Claims

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